WO2016002899A1

WO2016002899A1 - Multifunctional belt

Info

Publication number: WO2016002899A1
Application number: PCT/JP2015/069182
Authority: WO
Inventors: 龍起井上; 中村　晴彦
Original assignee: ゲイツ・ユニッタ・アジア株式会社
Priority date: 2014-07-04
Filing date: 2015-07-02
Publication date: 2016-01-07
Also published as: CN106536384B; JP6085034B2; JPWO2016002899A1; CN106536384A; TWI652418B; TW201608148A

Abstract

A long belt body (70) comprises an elastomer. A plurality of high-strength core wires (71) are embedded in the belt body (70) so as to extend in the longitudinal direction of the belt body (70) and be arranged parallel to each other. Conductor core wires (72, 73) are embedded in the belt body (70) so as to extend in the longitudinal direction of the belt body (70), the high-strength core wires (71) and the conductor core wires (72, 73) being alternately arranged in the width direction of the belt body (70).

Description

Multifunctional belt

The present invention relates to a multifunction belt that can be used to move a movable rack in, for example, an automatic warehouse.

Conventionally, as a configuration for driving a movable rack provided in an automatic warehouse or the like, a cable such as a power supply cable for connecting a drive motor mounted on the movable rack and a power source provided outside the movable rack is used. In addition, the one inserted through the cable bear is known (Patent Document 1). The cable bearer is constructed by flexibly connecting a large number of top members formed with spaces for the insertion of cables, can accommodate multiple cables, and deforms following the movement of the movable rack. Protect the cable.

JP 2011-241070 A

It is also possible to adopt a configuration in which the movable rack is driven by a power transmission belt. However, power supply / communication to the movable rack requires that the cable bearer be inserted with an electric wire or cable, and the use of both the belt and the cable bear increases the device for driving the movable rack. Produce.

It is an object of the present invention to provide a multifunction belt that can mechanically move a movable device such as a movable rack without using a protection member such as a cable bear, and can supply power to and communicate with the movable device. Yes.

A multifunction belt according to the present invention includes a long belt body made of an elastomer, a plurality of high-strength core wires embedded in the belt body, extending in the longitudinal direction of the belt body, and arranged in parallel to each other, and a belt And a conductor provided in the main body and extending in the longitudinal direction of the belt main body.

Preferably, the conductor is a plurality of conductor core wires embedded in the belt body, and the high-strength core wires and the conductor core wires are alternately arranged in the width direction of the belt body. In this case, it is preferable that the high-strength core wire and the conductor core wire are arranged so as to contact a straight line parallel to the surface of the belt body in the cross section of the belt body. A plurality of conductor core wires may be provided between the high strength core wires. Furthermore, high-strength cores may be disposed at both ends in the cross section of the belt body. Further, the conductor core wire may be covered with an insulator.

The conductor may be a conductor core wire embedded in the belt body, and a plurality of high-strength core wires may be disposed so as to cover the outer peripheral surface of one conductor core wire. Alternatively, the conductor may be a conductor core wire embedded in the belt body, and a plurality of conductor core wires may be disposed so as to cover the outer peripheral surface of one high-strength core wire.

The conductor may be a wiring formed on a flexible printed wiring board. In this case, the flexible printed wiring board is attached to the surface of the belt body.

Preferably, the conductor is a plurality of conductor core wires embedded in the belt body, and the conductor core wires have a conductor resistance value lower than that of the high-strength core wires. As a result, high power can be supplied. The conductor core wire preferably has an annealed copper wire or a copper alloy wire.

Also preferably, the conductor core wire is covered with a coating material that does not adhere to the elastomer of the belt body. According to this configuration, even if the multifunction belt is bent, a relative displacement occurs between the elastomer of the belt body and the conductor core wire, so that the conductor core wire is hardly damaged, and the durability of the multifunction belt is improved. Will improve. In this case, the coating material is preferably made of a material having a melting point higher than that of the belt body elastomer. The coating material is made of, for example, a fluororesin.

The conductor core wire has, for example, a single wire, a twisted wire (collective twist, a rope twist), a shielded wire, a cable, and a shielded cable. More preferably, a conductive material is added to the elastomer of the belt body. According to this, complicated signal communication is enabled by the conductor core wire, and noise countermeasures in signal communication are taken.

The high-strength core of the multi-function belt has a belt elongation change rate of 0.2% in the load control region of the belt in which a plurality of high-strength cores and conductor cores are alternately arranged in the belt body made of elastomer. It is preferable that the design is as follows.

The hardness of the elastomer of the belt body is, for example, in the range of A80 to A95.

The belt body is formed, for example, as a toothed belt or a flat belt.

According to the present invention, it is possible to obtain a multifunction belt capable of mechanically moving a movable device such as a movable rack and feeding and communicating with the movable device without using a protective member such as a cable bear. .

It is a figure which shows the schematic structure of the automatic warehouse where the multifunction belt of 1st Embodiment of this invention is used. It is a perspective view which shows the conductor core wire which protrudes from the both ends of a belt main body. It is a figure which shows the electric circuit containing a conductor core wire. It is a cross-sectional view of the multifunction belt according to the first embodiment. It is an expanded sectional view of a conductor core wire. It is a cross-sectional view of a multifunction belt according to the second embodiment. It is sectional drawing of a hybrid core wire. It is a cross-sectional view of a multifunction belt according to a third embodiment. It is sectional drawing which shows the 1st example of a conductor core wire. It is sectional drawing which shows the 2nd example of a conductor core wire. It is sectional drawing which shows the 3rd example of a conductor core wire. It is sectional drawing which shows the 4th example of a conductor core wire. It is sectional drawing which shows the 5th example of a conductor core wire. It is a figure which shows the method of the load bearing test of a multifunction belt. It is a figure which shows the result of the load bearing test of a multifunction belt.

50 Multifunctional belt 70 Belt body 71 High-

strength core wire

72, 73 Conductor core wire

Hereinafter, the multifunction belt of the present invention will be described with reference to the illustrated embodiment. FIG. 1 shows a schematic configuration of an automatic warehouse as an example of use of the multifunction belt 50 according to the first embodiment of the present invention.

The movable rack 51 is moved up and down by the multifunction belt 50. The movable rack 51 can be stopped at the stages S1 to S5 provided from the first floor to the fifth floor, and the container C is exchanged with each of the stages S1 to S5. The movable rack 51 is provided with an electromagnet 52, and a connecting member 53 that is attracted to the electromagnet 52 is provided at the end of the floor of each of the stages S1 to S5. That is, the movable rack 51 can be fixed by attracting the electromagnet 52 and the connecting member 53 in each of the stages S1 to S5.

Each stage S1 to S5 is provided with a roller conveyor 54 for moving the container C, and a motor 55 for rotating the roller conveyor 54. Similarly, the movable rack 51 is also provided with a roller conveyor 56 and a motor 57 for moving the container C. A barcode 58 is attached to the outer wall surface of the container C to identify the container C, and a barcode reader 59 for reading the barcode 58 is provided on the movable rack 51. In addition, a strain gauge type weigh scale 61 is provided in part of the roller conveyor 56 of the movable rack 51 in order to measure the weight of the container C placed on the roller conveyor 56.

The movable rack 51 is connected to one end of the multi-function belt 50 by a clamp 62, and the other end of the multi-function belt 50 is connected to a clamp 63 fixed to the floor surface of the automatic warehouse. The multi-function belt 50 is wound around a driving pulley 64, fixed

pulleys

65 and 66, and moving

pulleys

67 and 68. The multifunction belt 50 is a toothed belt. That is, the driving pulley 64 and the

constant pulleys

65 and 66 are toothed pulleys, and the moving

pulleys

67 and 68 are flat pulleys.

As will be described later, a high-strength core wire 71 and conductor core wires 72 and 73 (FIGS. 2 and 3) are embedded in the multifunction belt 50, and the

conductor core wires

72 and 73 protrude from the end portion on the clamp 63 side. Connected to the control unit 74. The control unit 74 is connected to a power source 75 and performs power feeding and signal communication via

conductor core wires

72 and 73 as will be described later. The control unit 74 is also connected to a motor 76 for driving the driving pulley 64, and supplies and controls the motor 76.

The material of the belt main body 70 of the multi-function belt 50 is an elastomer, and as shown in FIG. 2, both ends thereof are removed to expose the power conductor core wire 72 and the signal conductor core wire 73. Every other high-strength core wire 71 is provided. That is, the power conductor core wire 72 or the signal conductor core wire 73 is provided between two adjacent high-strength core wires 71.

3, the power conductor core wire 72 is connected to the electromagnet 52 and the

motors

55 and 57, and the signal conductor core wire 73 is connected to the bar code reader 59 and the weigh scale 61. All the

conductor core wires

72 and 73 are connected to the power source 75 via the control unit 74. That is, power is supplied to the

motors

55 and 57 via the power conductor core wire 72, whereby the container C is delivered between the stages S1 to S5 and the movable rack 51, and is fixed on the

conveyors

54 and 56. The Power supply to the electromagnet 52 is also performed through the power conductor core wire 72, and the movable rack 51 is fixed at the height positions of the stages S1 to S5. Power supply to the barcode reader 59 and signal communication are performed via the signal conductor core wire 73, and the container C is identified by the control unit 74. Power feeding and signal communication for the weighing scale 61 are also performed by the signal conductor core wire 73, and the weight of the container C is measured by the control unit 74.

FIG. 4 is a cross-sectional view of the multifunction belt 50 according to the first embodiment. The multifunction belt 50 has a long belt body 70 made of an elastomer (thermoplastic resin). As the thermoplastic elastomer constituting the belt body 70, urethane elastomer, polyester elastomer, polyolefin elastomer, silicon elastomer, polyamide elastomer, polystyrene elastomer, and the like can be used. Urethane elastomer and polyester elastomer are suitable materials.

A high-strength core wire 71 and

conductor core wires

72 and 73 are embedded in a portion of the belt body 70 that is close to the bottom surface 78 of the belt teeth 77. For reasons of manufacturing the multifunction belt 50, a part of each of the high-strength core wire 71 and the

conductor core wires

72 and 73 is exposed at the bottom surface 78. That is, in this specification, “embedding” does not mean that the high-strength core wire 71 and the

conductor core wires

72 and 73 are completely embedded in the belt body 70, but may be partially exposed from the belt body 70. Including.

The high-strength core wire 71 is, for example, a steel wire, but high-strength and high-elasticity core wires such as an aramid core wire, a carbon core wire, a PBO core wire, and a high-strength glass core wire can be used. The

conductor core wires

72 and 73 are, for example, annealed copper wires or copper alloy wires. A plurality of high-strength core wires 71 and

conductor core wires

72 and 73 are both provided and arranged in parallel to each other. The high-strength core wires 71 and the

conductor core wires

72 and 73 are alternately arranged at equal intervals in the width direction of the belt body 70, and the

conductor core wires

72 or 73 are disposed between two adjacent high-strength core wires 71. Is placed. High-strength core wires 71 are disposed at both ends in the cross section of the belt body 70.

The surface on the bottom surface 78 side of the belt teeth 77 of the high strength core wire 71 and the

conductor core wires

72 and 73 is on a common surface, that is, in the cross section of the belt body 70, the high strength core wire 71 and the

conductor core wires

72, 73 are arranged so as to be in contact with a straight line parallel to the bottom surface (surface) 78 of the belt main body 70. The high-strength core wire 71 and the

conductor core wires

72 and 73 extend in the longitudinal direction of the belt body 70 and reach both ends of the belt body 70. The thermoplastic resin is removed at both ends of the belt main body 70, and the

conductor core wires

72 and 73 are exposed and connected to electrical components provided on the

clamps

62 and 63. The high-strength core wire 71 does not protrude from both end faces of the belt body 70.

The material, outer diameter and number of the

conductor core wires

72 and 73 are determined in consideration of the power supplied to the driving motor 55 of the roller conveyor 54 and the driving motor 57 of the roller conveyor 56 via the control unit 74, etc. It is selected so as to have the following electrical characteristics (conductor resistance value, etc.).

FIG. 5 is an enlarged cross-sectional view of the

conductor core wires

72 and 73. As will be described later, the conductors 21 of the

conductor core wires

72 and 73 are formed by twisting a large number of strands in a certain direction, and the outer peripheral surface thereof is covered with the insulator layer 22 (see FIG. 9). That is, the

conductor core wires

72 and 73 have a configuration called aggregate twist. The

conductor core wires

72 and 73 are protected by the insulator layer 22 to improve insulation, but the insulator layer 22 can be omitted.

According to this embodiment, a power transmission function for mechanically driving the movable rack 51 up and down and a power supply function to a motor or the like for rotationally driving a roller conveyor for moving the container C are provided. The functional belt 50 can be provided. That is, a protective member such as a cable bear for protecting the power feeding cable is not required, and a movable device such as the movable rack 51 is mechanically moved, and a structure for feeding and communicating with the movable device is simplified and reduced in size. can do.

FIG. 6 is a cross-sectional view of the multifunction belt 50 according to the second embodiment. A difference from the first embodiment is that a hybrid core wire 31 formed by combining a high-strength core wire and a conductor core wire is embedded in the belt body 70. As shown in FIG. 7, the hybrid core wire 31 is formed by covering the outer peripheral surface of a stranded wire (collective stranded) conductor core wire 32 with an insulator layer 33, and further providing a high-strength core of a plurality of stranded wires (collective stranded). Covered by line 34. The hybrid core wires 31 are arranged at equal intervals in the width direction of the belt body 70.

According to the second embodiment, the same effect as that of the first embodiment can be obtained. However, since the hybrid core wires 31 are uniformly distributed in the width direction of the belt main body 70, the multifunction belt 70 is more than the first embodiment. Strength performance can be improved.

As a configuration of the hybrid core wire 31, a high-strength core wire may be disposed on the center side, and a plurality of conductor core wires may be provided so as to cover the outer peripheral surface of the high-strength core wire.

FIG. 8 is a cross-sectional view of the multifunction belt 50 according to the third embodiment. The difference from the first and second embodiments is that the conductor core wire is not embedded in the belt main body 70, and the flexible printed wiring board 41 having a conductor is attached to the back surface (surface) 80 of the belt main body 70. Is a point. That is, the wiring 42 formed on the flexible printed wiring board 41 is a conductor extending in the longitudinal direction of the belt main body 70, and the electrical power of the multifunction belt 50 is the same as the

conductor core wires

72 and 73 in the first and second embodiments. Although the flexible printed wiring board 41 is affixed to the back surface 80 of the belt main body 70, the change in the tensile force and the compressive force acting on the flexible printed wiring board 41 is shown in FIG. More severely than the form, the flexible printed wiring board 41 needs to be flexible enough to follow the change.

In the multifunction belt 50 of the first to third embodiments, the belt body 70 is formed as a toothed belt, but the present invention is not limited to the toothed belt, and the belt body is formed as a flat belt. It can also be applied to things.

9 to 13 show examples of conductor core wires.
FIG. 9 is a cross-sectional view showing a first example of the

conductor core wires

72 and 73 used in the first embodiment. This example is a twisted wire (aggregate twist) of an insulating film in which the outer peripheral surface of a conductor 81 is covered with an insulator 82. The conductor 81 is composed of a large number of soft copper wires or copper alloy wires as shown in Table 1. Molded by twisting in a certain direction. That is, in the case of an annealed copper wire, for example, 19 strands having a diameter of 0.08 mm are twisted to form a conductor core wire having a diameter of 0.40 mm. In the case of a copper alloy wire, for example, 28 or 44 strands having a diameter of 0.05 mm are twisted to form a conductor core wire having a diameter of 0.31 mm or 0.39 mm. As shown in Table 1, the conductor resistance value of the annealed copper wire and the copper alloy wire based on JISC3005 is about 1/10 of the steel core wire when the diameter is 0.4 mm, for example. Therefore, according to the conductor core wire formed using the annealed copper wire or the copper alloy wire, it is possible to supply high power, and particularly advantageous in the conductor core wire 72 for power.

In Table 1, the steel core wire is shown for comparison of the conductor resistance value between the annealed copper wire and the copper alloy wire. The steel core wire is composed of three strands of three strands of 0.08 mm diameter twisted together and seven strands of strands of three strands of 0.06 mm diameter twisted. The figure shows a twisted wire twisted by combining seven strands twisted together and three strands of three strands having a diameter of 0.08 mm. That is, all the steel core wires shown in Table 1 are formed by twisted wires (rope twists).

The insulator 82 is a fluororesin (ETFE or the like) that does not melt into the urethane resin that is an elastomer of the belt main body 70 and does not adhere to the urethane resin during belt molding. That is, the insulator 82 which is a coating material is made of a material having a melting point higher than that of the urethane resin. By using such an insulator 82, even if the

conductor core wires

72 and 73 are exposed from the belt body 70, the

conductor core wires

72 and 73 are not short-circuited. Further, since the insulator 82 does not adhere to the belt main body 70, the

conductor core wires

72 and 73 can be displaced relative to the belt main body 70. Therefore, even if the multifunction belt 50 is repeatedly bent by the driving pulley 64, the fixed

pulleys

65 and 66, and the moving

pulleys

67 and 68, the load acting on the

conductor core wires

72 and 73 can be suppressed. Improves.

In the signal conductor core wire 73, noise countermeasures are necessary so that the transmitted signal does not include noise. Therefore, a conductive material such as carbon is added to the elastomer of the belt main body 70, and the belt main body 70 is given conductivity. Therefore, according to the multifunction belt 50 of the present embodiment, no error occurs in reading of the bar code reader 59, measurement of the weighing scale 61, and the like.

Note that fluororesin is a suitable material for the insulator 82, but other usable materials include silicon rubber and polyimide resin. In addition to ETFE, PTFE, PFA, FEP, PVDF, etc. can be used as the fluororesin.

FIG. 10 is a cross-sectional view showing a rope twisted stranded wire as a second example of the

conductor core wires

72 and 73. The conductor 81 in this example has, for example, a stranded wire (rope stranded) in which seven strands 83 formed by twisting seven strands having a diameter of 0.08 mm are twisted, and the outer surface of the conductor 81 is an insulator 82. It is covered.

FIG. 11 is a cross-sectional view showing a shield wire as a third example of the

conductor core wires

72 and 73. In this example, the outer peripheral surface of a conductor 81 made of an annealed copper wire or a copper alloy wire as shown in Table 1 is covered with an insulator 82, the outside of the insulator 82 is covered with a metal shield 84, and the outside is covered with an insulating material. The sheath 85 is covered. That is, the conductor 81 is covered with an insulator 82 and a sheath 85, and the sheath 85 has a melting point higher than that of the elastomer of the belt body 70 and does not adhere to the elastomer of the belt body. By using such a shield wire, noise countermeasures in signal communication become more complete.

FIG. 12 is a cross-sectional view showing a cable as a third example of the

conductor core wires

72 and 73. This example has a configuration in which three stranded wires (aggregate twist) 86 having the same configuration as in FIG. 9 are twisted together, and the outside is covered with a paper tape 87 and the outer peripheral surface is covered with a sheath 88 of an insulating material. Even with such a cable, noise countermeasures can be improved in the same manner as shielded wires.

FIG. 13 is a cross-sectional view showing a cable that is a fourth example of the

conductor core wires

72 and 73. In this example, three stranded wires (collective twist) 86 having the same configuration as in FIG. 9 are twisted together, and the outside is covered with a paper tape 87, the outside is covered with a metal shield 84, and the outer peripheral surface is further covered with an insulating material. The sheath 88 is covered. Even with such a cable, noise countermeasures can be improved in the same manner as shielded wires.

As described above, the multifunction belt 50 according to the first to third embodiments has the

conductor core wires

72 and 73 or the wirings 42 as conductors, and therefore supplies power to various drive mechanisms via the multifunction belt 50. In addition, an electric signal can be transmitted to the control device. Further, a protective member such as a cable bear can be omitted, and the device provided with the multifunction belt 50 can be downsized.

Since the

conductor core wires

72 and 73 are formed using an annealed copper wire or a copper alloy wire, high power feeding is possible. Therefore, in particular, the motor 57 mounted on the movable rack 51 can have a high output and a high-speed reaction, and the time required for putting the container C into and out of the warehouse (first to fifth stages S1 to S5) can be shortened. be able to. In addition, since the high-power electromagnet 52 of the movable rack 51 can be used, the movable rack 51 can be fixed, the container C can be fixed, and the container C can be conveyed using electromagnetic force. Furthermore, various functions such as opening and closing of lighting fixtures and doors, and movement of arms can be employed.

Furthermore, since complex signal communication becomes possible, the control of the operation of the movable rack 51 can be miniaturized, and the reading accuracy of the barcode reader 59 and the measurement accuracy of the weighing scale 61 can be improved. Moreover, since the

conductor core wires

72 and 73 are covered with an insulator, it is possible to prevent the occurrence of accidents such as short circuit, electric shock, fire, etc., improve safety, and improve equipment maintenance. Moreover, the insulation work in the terminal processing of the

conductor core wires

72 and 73 can be simplified.

(Example)
An endless multi-functional belt having basically the same configuration as the multi-functional belt 50 of the first embodiment was created and attached to a pair of pulleys to perform a durability test. The driving pulley and the driven pulley are toothed pulleys having a trapezoidal tooth profile with 18 teeth and a tooth pitch of 5 mm. The rotational speed of the driving pulley was set to 4000 rpm. The sample belt is a toothed belt having trapezoidal teeth with a tooth pitch of 5 mm, a circumferential length of 600 mm, a width of 15 mm, and an endless shape formed by joint processing. The mounting tension is set to 100 N. .

As shown in Table 2, in the sample belt 1, the conductor core wire is made of a copper alloy wire and formed by twisting 28 strands having a diameter of 0.05 mm, and the outer peripheral surface thereof is covered with an insulator. First, an isocyanate adhesion treatment is performed for adhesion of the belt body with urethane. That is, the sample belt 1 is not included in the present invention and is a comparative example.

The conductor core wire of the sample belt 2 is made of annealed copper wire, formed by twisting 19 strands having a diameter of 0.08 mm, and the outer peripheral surface thereof is covered with an insulator made of ETFE. The conductor core wire of the sample belt 3 is the same as that of the sample belt 2, but the urethane resin, which is the material of the belt body, has a lower hardness than the sample belt 2. The conductor of the sample belt 4 is made of a copper alloy wire, formed by twisting 28 strands having a diameter of 0.05 mm, and its outer peripheral surface is covered with an insulator made of ETFE. Is the same as the sample belt 3. That is, the sample belts 2, 3, and 4 are embodiments of the present invention. In the sample belts 2 to 4, the belt body elastomer has a hardness measured by a test based on the JISK6253 standard in the range of A80 to A95.

In the durability test, an electric current was passed through the conductor core wire, and the presence or absence of cutting of the conductor core wire was detected by a tester. The number of times of bending of the sample belt in this detection of cutting is a numerical value obtained by counting once every time the sample belt rotates once and bends half a turn (180 °) at each of the driving pulley and the driven pulley.

As shown in Table 2, the sample belt 1 was cut by bending less than 10,000 times. That is, the conductor core wire was confirmed to be cut at the pip portion and the tooth root portion, which is presumed to be due to stress concentration. Sample belt 2 was cut by bending less than 2 to 5 million times. This is probably because the stress concentration was alleviated due to slippage between the ETFE insulator and the belt body, and the durability was improved as compared with the sample belt 1. Sample belt 3 was cut by bending 8 to 15 million times. This is presumably because the stress acting on the conductor core wire was further relaxed by making the hardness of the urethane of the belt body softer than that of the sample belt 2. The sample belt 4 was not cut even when bent up to 20 million times. This is probably because the bending fatigue resistance was improved because the conductor core wire was made of a copper alloy wire.

In designing a high-strength core wire of the multifunction belt, it is considered preferable to consider the expansion / contraction rate of the multifunction belt in order to avoid fatigue failure of the conductor core wire due to the expansion / contraction of the multifunction belt. Therefore, a load bearing test was performed on the multifunctional belt, and an attempt was made to design a high-strength core wire in which the rate of change in elongation of the sample belt was 0.2% or less with respect to the load generated on the sample belt. The configuration of the sample belt used in the load bearing test is as follows.
The belt body is made of urethane resin, the belt width is 15 mm, and the distance between the belt markings is 100 mm.
The configuration of the high-strength core wire was a steel core wire of 7 × 3 × 0.08 mm, and four S-strand core wires and four Z-strand wires were alternately arranged in a width of 15 mm.
One of the following two types of conductor core wires was used, and seven conductor core wires and seven high-strength core wires were alternately arranged.
Conductor core wire 1: ETFE coated copper alloy core wire. Twisted strands of 28 strands with a diameter of 0.05mm.
Conductor core wire 2: ETFE-coated annealed copper core wire. 19 twisted strands of 0.08mm diameter strand.

Referring to FIG. 14, a method for a load bearing test of the multifunction belt will be described. Both ends of the sample belt B were gripped by the

clamps

91 and 92, and a tensile load was applied to the sample belt B through the

clamps

91 and 92. The period of the tensile load was 20 Hz. Generally, the belt mounting tension is set so that the tension on the belt loosening side is always 0 N or more when a load is generated on the belt. Therefore, in this load resistance test, the tension on the loose side was determined to be 20N. Further, the load amplitude was set to 100 N, the load magnitude was variously changed as will be described later, and the potential difference at both ends of the sample belt B was detected by the sensor 93 to determine whether or not the conductor core wire was broken.

Referring to FIG. 15, the results of the load bearing test of the multifunction belt will be described. When the load control region was 700N to 20N, the elongation percentage of the sample belt B was 0.60 to 0.70%, as indicated by reference numeral F1. Further, in the sample belt B having the conductor core wire 1, the cutting of the conductor core wire 1 was detected in about 100,000 to 200,000 cycles, but in the sample belt B having the conductor core wire 2, the conductor core was detected in 7,000 to 350,000 cycles. Line 2 break was detected. When the load control region was 475N to 20N, the elongation percentage of the sample belt B was 0.40 to 0.50%, as indicated by reference numeral F2. In the sample belt B having the conductor core wire 1, cutting of the conductor core wire 1 was detected in 900,000 to 2.1 million cycles. In the sample belt B having the conductor core wire 2, the conductor core wire was detected in 200,000 to 500,000 cycles. Two breaks were detected.

When the load control region was 350N to 20N, the elongation percentage of the sample belt B was 0.30 to 0.40%, as indicated by reference numeral F3. In the sample belt B having the conductor core wire 2, the cutting of the conductor core wire 2 was detected in about 250,000 to 800,000 cycles. In the sample belt B having the conductor core wire 1, the conductor core wire 1 was cut in 3 million cycles. Some cuts were detected, or some did not cut even after exceeding 15 million cycles. When the load control region was 220N to 20N, the elongation percentage of the sample belt B was 0.10 to 0.20% as indicated by reference numeral F4. In addition, the cutting of the conductor core wire 1 is not detected even if the sample belt B having the conductor core wire 1 exceeds 15 million cycles, and the cutting is detected in the sample belt B having the conductor core wire 2 exceeding 10 million cycles. There wasn't.

From the results of the load resistance test as described above, the belt elongation change rate in the load control region of the belt formed by alternately arranging a plurality of high-strength core wires and conductor core wires in the belt body made of elastomer is 0.2. It has been confirmed that designing a high-strength core wire of a multifunctional belt so as to be less than or equal to% is effective in improving durability under use conditions.

Claims

A long belt body made of elastomer,
A plurality of high-strength core wires embedded in the belt body, extending in the longitudinal direction of the belt body, and arranged parallel to each other;
A multifunctional belt comprising: a conductor provided on the belt body and extending in a longitudinal direction of the belt body.
The conductor is a plurality of conductor core wires embedded in the belt main body, and the high-strength core wires and the conductor core wires are alternately arranged in the width direction of the belt main body. The multifunction belt according to 1.
3. The multifunction belt according to claim 2, wherein the high-strength core wire and the conductor core wire are arranged so as to be in contact with a straight line parallel to the surface of the belt main body in a cross section of the belt main body. .
3. The multifunction belt according to claim 2, wherein a plurality of the conductor core wires are provided between the high strength core wires.
The multifunction belt according to claim 2, wherein the high-strength core wire is disposed at both ends in a cross section of the belt main body.
The multifunction belt according to claim 2, wherein the conductor core wire is covered with an insulator.
The conductor is a conductor core wire embedded in the belt body, and a plurality of the high-strength core wires are disposed so as to cover an outer peripheral surface of one conductor core wire. Item 2. The multifunction belt according to item 1.
The conductor is a conductor core wire embedded in the belt body, and a plurality of the conductor core wires are disposed so as to cover an outer peripheral surface of one high-strength core wire. Item 2. The multifunction belt according to item 1.
The multifunction belt according to claim 1, wherein the conductor is a wiring formed on a flexible printed wiring board, and the flexible printed wiring board is attached to a surface of the belt main body.
The multifunction according to claim 1, wherein the conductor is a plurality of conductor core wires embedded in the belt body, and the conductor core wires have a conductor resistance value lower than that of the high-strength core wires. belt.
The multifunction belt according to claim 10, wherein the conductor core wire includes an annealed copper wire or a copper alloy wire.
The multifunction belt according to claim 10, wherein the conductor core wire is covered with a coating material that does not adhere to the elastomer of the belt body.
The multifunction belt according to claim 12, wherein the coating material is made of a material having a melting point higher than that of the elastomer of the belt body.
The multifunction belt according to claim 13, wherein the coating material is made of a fluororesin.
The multi-function according to claim 10, wherein the conductor core wire has any one of a single wire, a twisted wire (collective twist), a twisted wire (rope twist), a shielded wire, a cable, and a shielded cable. belt.
2. The multifunction belt according to claim 1, wherein a conductive material is added to the elastomer of the belt body.
High strength designed to have a belt elongation change rate of 0.2% or less in the load control area of the belt in which a plurality of high-strength core wires and conductor core wires are alternately arranged in a belt body made of elastomer. The multifunction belt according to claim 1, further comprising a core wire.
The multifunction belt according to claim 1, wherein the hardness of the elastomer of the belt body is A80 to A95.
The multifunction belt according to claim 1, wherein the belt body is formed as a toothed belt.
The multifunction belt according to claim 1, wherein the belt body is formed as a flat belt.